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A laser beam of pluse power 10^(12) watt...

A laser beam of pluse power `10^(12)` watt is focussed on an object are `10^(-4) cm^(2)`. The energy flux in `watt//cm^(2)` at the point of focus is

A

`10^(20)`

B

`10^(16)`

C

`10^(8)`

D

`10^(4)`

Text Solution

Verified by Experts

The correct Answer is:
b
The energy flux
`varphi=("pulse power")/("Area")=(10^(12))/(10^(-4))=10^(16)(W)/(cm^(2))`
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